Re: [PROBLEM] Machine Freezes while Running Crossover Office

[Pekka Enberg <penberg@cs.helsinki.fi>]

Hi,

On Sun, 2005-05-29 at 15:59 -0700, Linus Torvalds wrote:
> However, I don't understand how wine can block the X server from doing 
> even cursor updates. It might be a scheduler bug, of course. The one thing 
> a bigger pipe buffer does is end up changing scheduling behaviour. 
> 
> (On the other hand, I would not be surprised if Wine does something that 
> makes X pause, like use DGA or whatever and tells X not to update the 
> screen, including cursors).

It is not just X. Running the following shell script when hitting the
bug:

#!/bin/sh

while : ; do
  date
  sleep 1
done

shows the following output:

penberg ~/pipe-test 49 ./show-date
Mon May 30 18:16:52 EEST 2005
Mon May 30 18:16:53 EEST 2005
Mon May 30 18:16:54 EEST 2005
Mon May 30 18:16:55 EEST 2005
Mon May 30 18:17:15 EEST 2005
Mon May 30 18:17:16 EEST 2005

It looks like no other processes other than wineserver and
wine-preloader get any CPU time (also evident from Sysrq-P traces).

On Sun, 2005-05-29 at 15:59 -0700, Linus Torvalds wrote:
> Are you sure your oprofile PC map is correct?

Yes, the pipe_poll calls come from wineserver actually, not
wine-preloader (of which I showed strace output before).

Any suggestions on how to debug this further? I am not sure I understood
your point about watching poll timeouts.

			Pekka